diff --git a/nav2_common/nav2_common/launch/rewritten_yaml.py b/nav2_common/nav2_common/launch/rewritten_yaml.py
index 4e08efbf9d0..63d3905d5e4 100644
--- a/nav2_common/nav2_common/launch/rewritten_yaml.py
+++ b/nav2_common/nav2_common/launch/rewritten_yaml.py
@@ -157,7 +157,7 @@ def pathify(self, d, p=None, paths=None, joinchar='.'):
             return paths
         pn = p
         if p != "":
-            pn += '.'
+            pn += joinchar
         if isinstance(d, dict):
             for k in d:
                 v = d[k]